Burglar-alarm.



116.8115629. PATENTBD PEB. 26, 1.907. J. GAYNOR. Y' v BURGLAR A906;

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@/y Ml JOSEPH GAYNOR, OF BARRE, VE-RMUN'I.

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Specification of Letters Patent.

Application filed August 25. 1936. Serial No. 332,042.

To au whom it may concern:

Be 1t known that i. Josera Garnett, a citi zen of the United States, residing at Barre, in

the county of Washington and State ot Ver mont, have invented new and useful .lmprovenients m Burglar-Alarms, oi' which the following is a speciiication.

The invention relates to an improvement in burglar-alarms of the type wherein Aa trap is arranged at a determinate point in the i'loor of a room anddesigned to be operated by the Weight of an intruder, an automatic alarm being Continuously sounded after the initial loperation of the trap.

The' invention will be described in the following specification, reference being had particularly to the accompanying drawings, in whichf Figure 1 is a sectional View illustrating the application of my invention. Fig. 2 is a diagrammatic viewillustrating the wiring of the alarm proper.

.Referring to the drawings, 1 represents a compartment in which is located a safe 2 or other-particular article which it is desired to protect.- A trap 3 is formed in the floor proper adjacent the safe, being ci a size to prevent access to the safe except when on the trap. the iloor and has hingen connection therewith, as at 4, being 'disposed to move downward under the iniluence of a weight on the trap. A spring 5, supported in brackets 6, secured to the studding beneath the particular compartment, is designed to normallysupport the trap in elevated or closed position. Pro- Vislon is made for receiving the intruder pre cipitated from the trap-opening by arranging a closed compartment 7 beneaththe trap, which latter compartment may be provided with a door 8 to a'ord access to authorized individuals, and ma ,if preferred, be provided with a paddo iloor 9 to prevent excessive injury to the party caught in the trap. A

ln connection with the trap ll arrange an automatic alarm comprising a signaling de vice 10, which may be disposed at any desired point either in the building in which the trap is arranged or at a rdistance therefrom, as

Conductors 12 and '13 lead fromk the signal and through a source of energy 14,

desirable.

The trap is referably a section of.

terminating, respectively, in contact-strips 15 and 16. These respective strips are supported by the floor of the compartment 1 immediately adjacent the reatively free edge of the trap 3. The strips 15 and 16 are normally spaced and. form the only break in the alarm-circuit. The strip 16 is formed intermediate its ends with a depression 17,' preferabiy by bending the strip into the angular shape illustrated, the free end of the strip being also bent toward the strip 15 to pro-vide for more effective Contactin operation. A trigger 18 is pivotall-y supported on the under side oi' the ioor of the compartment 1 immediately ,adjacent the trap-opening- The trigger is of approximately right angular yshape and so pivoted that the free end of one arm projects beyond the edge of the trapopening in the path ofthe descending trap. The remaining arm of the trigger rests against the contact-strip 16 below the angul -iar depression 17 therein. i j" in operation the downward movement of 'the trap under 'the iniiuence of the Weight of the person thereon will engage and depress' the approximate arm of the trigger, thereby forcing the remaining arm into the depression 17 in the stinp 16. This movement ofthe trigger forces the strip 16 into contact with the strip 15, closing the alarm-circuit and sounding the signal. The angular depression 17' serves tomaintain the trigger in operative position, thereby insuring the continual contact of the stri s 15 and 16 until manuallydisengaged. T e alarm is there fore sounded continuously until after the initial operation of the trap entirely inde? pendent of the position of the'trap.

it is to be understood'that the trap is to be provided with some manually-operable securing means, as a bolt or the iike, by which 'the trap may Abe prevented from operation under the weightof a person during any desired intervals.

Having thus described the invention, what is claimed as new is A burglar-alarm includingv atrap arranged in the floor of a `compartment, a normally open alarm-circuit, s aced contact-Strips forming the terminals or said circuit and supported adjacent theplatform, one of said stripsfbeing'iormed with-an annular depres' Sion, and a trigger supported by the floor of '1 the compartment and arranged to be operated in the initiei movement of the trap, said i trigger forcing the contact-strips into engagement and riding?J into the said depression; t

` whereby to maintain the stlips in Contact independent of the position of the trap, i

1n testimony whereof, affix my signature in presence of two Witnesses.

' JosEPH GAYNoR. 

